linux-kernel - [PATCH 3/3] HID: i2c-hid: Align i2c_hid_set_power() retry with HID descriptor read

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Message-ID: <20240415170517.18780-4-kl@kl.wtf>
Date: Mon, 15 Apr 2024 19:04:13 +0200
From: Kenny Levinsen <kl@...wtf>
To: Jiri Kosina <jikos@...nel.org>,
	Dmitry Torokhov <dtor@...omium.org>,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Douglas Anderson <dianders@...omium.org>,
	Hans de Goede <hdegoede@...hat.com>,
	Maxime Ripard <mripard@...nel.org>,
	Kai-Heng Feng <kai.heng.feng@...onical.com>,
	Johan Hovold <johan+linaro@...nel.org>,
	linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Radoslaw Biernacki <rad@...omium.org>,
	Lukasz Majczak <lma@...omium.org>
Cc: Kenny Levinsen <kl@...wtf>
Subject: [PATCH 3/3] HID: i2c-hid: Align i2c_hid_set_power() retry with HID descriptor read

Instead of retrying on any error, just retry on EREMOTEIO and simplify
the retry handling a bit.

Signed-off-by: Kenny Levinsen <kl@...wtf>
---
 drivers/hid/i2c-hid/i2c-hid-core.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index ac661199d2c8..998e7aa140d7 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -395,21 +395,14 @@ static int i2c_hid_set_power(struct i2c_hid *ihid, int power_state)
 	 * The call will get a return value (EREMOTEIO) but device will be
 	 * triggered and activated. After that, it goes like a normal device.
 	 */
-	if (power_state == I2C_HID_PWR_ON) {
+	ret = i2c_hid_set_power_command(ihid, power_state);
+	if (ret == -EREMOTEIO && power_state == I2C_HID_PWR_ON)
 		ret = i2c_hid_set_power_command(ihid, I2C_HID_PWR_ON);
 
-		/* Device was already activated */
-		if (!ret)
-			goto set_pwr_exit;
-	}
-
-	ret = i2c_hid_set_power_command(ihid, power_state);
 	if (ret)
 		dev_err(&ihid->client->dev,
 			"failed to change power setting.\n");
 
-set_pwr_exit:
-
 	/*
 	 * The HID over I2C specification states that if a DEVICE needs time
 	 * after the PWR_ON request, it should utilise CLOCK stretching.
-- 
2.44.0